A 20-gauge active needle design with thin-film printed circuitry for interventional MRI at 0.55T.

ABSTRACT:

Purpose

This work aims to fabricate RF antenna components on metallic needle surfaces using biocompatible polyester tubing and conductive ink to develop an active interventional MRI needle for clinical use at 0.55 Tesla.

Methods

A custom computer numeric control-based conductive ink printing method was developed. Based on electromagnetic simulation results, thin-film RF antennas were printed with conductive ink and used to fabricate a medical grade, 20-gauge (0.87 mm outer diameter), 90-mm long active interventional MRI needle. The MRI visibility performance of the active needle prototype was tested in vitro in 1 gel phantom and in vivo in 1 swine. A nearly identical active needle constructed using a 44 American Wire Gauge insulated copper wire-wound RF receiver antenna was

SUBMITTER: Yildirim DK 

PROVIDER: S-EPMC8379519 | biostudies-literature | 2021 Sep

REPOSITORIES: biostudies-literature